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Epipremnum Aureum 'Green Genie'

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Epipremnum Aureum 'Green Genie' HORTSCIENCE 44(6):1783–1784. 2009. of 125 mmolÁm–2Ás–1) and under natural pho- toperiod within a temperature range of 15 to 34 °C. In each test, the cuttings were rooted Epipremnum aureum ‘Green Genie’ and removed from the propagation chamber Richard J. Henny1,4, Jianjun Chen2, and Terri A. Mellich3 after 10 weeks. The original 1.6-L pots containing the 12 rooted cuttings were set University of Florida, Institute of Food and Agricultural Sciences, Mid- on raised benches in the shaded greenhouse Florida Research and Education Center, 2725 Binion Road, Apopka, FL under natural photoperiod and temperature 32703 range as described previously. Treatments consisted of Peter’s liquid fertilizer 20N– Additional index words. Epipremnum aureum, pothos, golden pothos, foliage plant, foliage 8.8P–16.6K (Scotts-Sierra Horticultural plant production, plant breeding Products Company, Marysville, OH) at 100, 200, or 300 ppm applied once per week. The fertilizer treatments were applied as a 200- Epipremnum aureum Engler. is com- unique growth habit and foliar characteristics mL liquid drench per pot once weekly monly referred to as Pothos or Golden Pot- of Pothos ‘Green Genie’ were stable and throughout the duration of the experiments. hos. Pothos varieties are among the most made this plant suitable for introduction as Plants were placed in a completely random- popular tropical ornamental hanging basket a new cultivar. ized experimental design and hand-watered crops and are durable interior foliage plants as needed. Data recorded after 12 weeks of (Steinkamp et al., 1992). The genus Epiprem- Description growth included length of longest vine, num- num and its 10 known species are tree- ber of leaves, length and width of largest leaf, climbing vines native to the Solomon Islands. Pothos ‘Green Genie’ has a smaller over- and a visual quality rating in which 1 = dead, In natural tropical settings, pothos can grow all size compared with the original Marble 2 = fair, 3 = acceptable (saleable quality), 4 = to be large in size producing leaves up to 3 Queen cultivar. Mature leaves from ‘Green good, and 5 = excellent quality. Data were feet in length. Plants used for interiorscape Genie’ reach an average of 7 to 9 cm long and analyzed using the analysis of variance pro- purposes such as pedestal plants, totems, 4.8 to 5.8 cm wide compared with 10 to 12 cedures of SAS (SAS Institute Inc., Cary, hanging baskets, dish gardens, and small desk cm · 8 to10-cm leaves on ‘Marble Queen’. NC). Parameters with means showing signif- plants usually have heart-shaped leaves that Pothos ‘Green Genie’ leaves are shiny and icant differences were subjected to regression rarely exceed 6 inches in length. Common coloration is uniform deep green [RHS 139A; analysis. commercial cultivars include Golden Pothos Royal Horticultural Society (RHS), 1995]. (intricately mottled yellow variegation on Undersides of the leaves are a lighter green Results and Discussion a green field), Marble Queen (white variega- (RHS 137C). The stem or vine color is dark tion on a green field), Jade (uniform dark green (RHS 139A) on the upper side (the side Pothos ‘Green Genie’ was propagated by green leaves with no variegation), and Neon exposed to light) but gradually fades to tip cuttings for the first growth study as a (uniform chartreuse colored leaves). a lighter green (RHS 137C) on the underside. way to preserve limited stock for subsequent Petiole color is also green (RHS 137C) in the growth testing and for distribution for grower Origin center but the outer 1- to 2-mm edges are trials. After 3 months of growth, plants pro- white (RHS 155A). The white coloration in duced from tip cuttings showed no significant Pothos plants do not flower under green- the petiole wings is present on the four to five difference in vine length or in number of house or interior environments and flowering newest leaves on each vine tip. As leaves leaves at any of the three fertilizer levels is seldom reported even within native habi- mature, the white outer colored wing bands (Table 1). There was a significant linear tats. As a result, no pothos hybrids are known turn brown (RHS 200C). The white edge is increase in leaf length and in leaf width as to exist. As a result of the difficulty in unique to this new cultivar. Internode length fertilizer levels increased. The quality of flowering and hybridization and because of varies from 4 to 6 cm along the vine (Fig. 1). the commercial importance of this ornamen- Overall, ‘Green Genie’ has a sturdier and tal crop, we initiated a program at the Mid- thicker appearance compared with the parent Florida Research and Education Center plant, ‘Marble Queen’. (MREC) in Apopka, FL, to induce mutations from available pothos cultivars. Pothos Performance ‘Green Genie’ is a selection from that pro- gram. Pothos ‘Green Genie’ is a mutation Two growth studies were conducted using selected from Pothos ‘Marble Queen’ plants cuttings that were harvested from Pothos that had been irradiated a single time with ‘Green Genie’ stock plants maintained in 6.5 gray of gamma rays from a Cesium 137 a shaded greenhouse at MREC Apopka. In source that emitted 9.18 gray/minute. Nine April 2006, tip cuttings (3 to 4 cm in length months after irradiation, a single uniform and displaying one to two expanded leaves) stem mutation was discovered on one treated were taken and stuck 12 per 1.6-L pot plant. The mutant was removed from the containing Fafard #2 Mix (Conrad Fafard, mother plant and asexually increased by tip Inc., Agawam, MA; 55% Canadian peat: and single-node cuttings for 1 year to produce 25%:perlite:20% vermiculite). Thirty pots sufficient numbers of stock plants. During of tip cuttings were stuck. One month this process, it was determined that the later, single eye cuttings (a stem section consisting of one eye with one expanded leaf attached) were harvested from the stock plants and stuck 12 per 1.6-L pots also Received for publication 1 July 2009. Accepted for containing Fafard #2 medium. Thirty pots publication 6 Aug. 2009. 1Professor. of eye cuttings were stuck. All cuttings were 2Associate Professor. rooted in a plastic tent without intermit- 3Biologist. tent mist or fog to maintain high humidity Fig. 1. A 1-year-old plant of Epipremnum aureum 4To whom reprint requests should be addressed; (maximum irradiance of 80 mmolÁm–2Ás–1)in ‘Green Genie’ grown on a totem pole in a 3.9-L e-mail hennyrjz@ufl.edu. a shaded greenhouse (maximum irradiance pot. HORTSCIENCE VOL. 44(6) OCTOBER 2009 1783 Table 1. Effect of three fertilizer levels on length of longest vine, number of expanded leaves on longest as was observed with tip cuttings, there was vine, largest leaf length and width and visual quality of Pothos ‘Green Genie’, propagated from tip a significant linear increase in leaf length cuttings, after 12 weeks growth (June to August) in 1.6-L pots. and width as fertilizer levels increased. Fertilizerz Vine length No. of leaves Leaf length Leaf width Visual Plant quality ratings also increased signifi- (mg/L) (cm) (cm) (cm) (cm) qualityy cantly linearly as fertilizer treatment rates 100 37.2 9.7 7.2 4.9 3.0 increased. 200 38.0 9.3 7.8 5.0 4.0 300 39.2 9.3 8.8 5.8 4.7 Availability Significancex NS NS Lin* Lin* Lin** z 20N–20P205–20K20 = Peters liquid 20N–8.8P–16.6K applied 200 mL/pot/week. y Pothos ‘Green Genie’ is intended for Visual quality in which 1 = poor, 2 = fair, 3 = salable, 4 = good, and 5 = excellent quality. commercial producers growing finished or- xSignificance in which NS = nonsignificant difference and Lin* and Lin** = linear significance at 0.05 and 0.01% level, respectively. namental tropical foliage plants. Trademark and Plant Patent Rights issued through the Table 2. Effect of three fertilizer levels on length of longest vine, number of expanded leaves on longest U.S. Patent and Trademark Office will be vine, largest leaf length and width, and visual quality of Pothos ‘Green Genie’ propagated from single assigned to the University of Florida, Board eye cuttings after 12 weeks growth (July to September) in 1.6-L pots. of Trustees. Stock plants will be released to Fertilizerz Vine length No. of leaves Leaf length Leaf width Visual licensed Florida growers for propagation and (mg/L) (cm) (cm) (cm) (cm) qualityy distribution. Inquiries regarding licensing 100 43.2 10.5 7.4 4.8 3.0 may be sent to Florida Foundation Seed 200 54.8 12.0 7.4 5.8 4.0 Producers, Inc., P.O. Box 110200, Gaines- 300 57.2 12.5 7.8 5.8 4.5 ville, FL 32611. Plants for research purposes Significancex NS NS Lin* Lin* Lin** may be obtained directly from the author. z 20N–20P205–20K20 = Peters liquid 20N–8.8P–16.6K applied 200 mL/pot/week. yVisual quality in which 1 = poor, 2 = fair, 3 = salable, 4 = good, and 5 = excellent quality. xSignificance in which NS = nonsignificant difference and Lin* and Lin** = linear significance at 0.05 and Literature Cited 0.01% level, respectively. Royal Horticultural Society. 1995. The Royal Horticultural Society’s colour chart. 3rd Ed. plants developing from tip cuttings also in- duced from eye cuttings showed no signifi- Royal Hort. Soc., London, UK. creased linearly as fertilizer levels increased. cant difference in vine length or number of Steinkamp, K., A.R. Chase, and R.T. Poole. 1992. Results from the second growth study leaves resulting from fertilizer treatment Pothos production overview. CFREC-Apopka indicated that Pothos ‘Green Genie’ pro- levels after 3 months (Table 2).
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